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DEBT - Interest Expense (Details) - Convertible debt - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Feb. 29, 2020
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Debt Instrument [Line Items]          
Interest rate 0.75% 0.75% 0.75% 0.75% 0.75%
Contractual interest expense (0.75% coupon)   $ 1,125 $ 1,125 $ 3,375 $ 3,375
Amortization of issuance costs   724 677 2,163 2,025
Interest expense   $ 1,849 $ 1,802 $ 5,538 $ 5,400
Weighted-average effective interest rate   1.20% 1.20% 1.20% 1.20%